Issue-03 (09/2003)
Use of the new Spinning Drop Tensiometer SITE100 for characterization of critical micelle formation concentrations
The stability of emulsions is to a large extent determined by interfacial properties of the participating phases, and their storage stability can be optimized by the use of emulsifiers to lower the interfacial tension. This is made possible by the fact that the
reduction in the interfacial tension lowers the driving force for separating the oil and water phases. The optimum adjustment of the necessary amount at a particular temperature depends on the diffusion rate at the interfacial boundary and the critical micelle concentration, among other things.
The Washburn "C" Factor for characterization of porous coatings
Porous coatings find application in a wide variety of industrial, military, and medical applications. For example, porous photo and electro catalytic coatings are used in applications ranging from chromate production to cyanide destruction - and are also being explored for use in air and water treatment. In the medical field, porous coatings are used on the surface of replacement joints to promote a stable bone-implant interface by providing support for both ingrowth and ongrowth. Porous coatings are also widely used to support various reagents for blood and plasma analysis on diagnostic strips and slides.